Pablo:
> I agree we should be careful here. There are several things to consider:

Yes, and thanks for your thorough reply and insights. I do not suggest converting macros blindly, and I have no intention of doing so. Apart from the three PyUnicode_*() cases mentioned in msg388870, I've not found any misuse of macros that reuse their arguments in the CPython code base.

Perhaps using a meta-issue is the wrong approach. I guess a PEP is too much? I'll start a thread on dpo (or on the list).

Thanks.